CN107340918B - Array substrate, touch display panel and touch display device - Google Patents

Array substrate, touch display panel and touch display device Download PDF

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Publication number
CN107340918B
CN107340918B CN201710524178.XA CN201710524178A CN107340918B CN 107340918 B CN107340918 B CN 107340918B CN 201710524178 A CN201710524178 A CN 201710524178A CN 107340918 B CN107340918 B CN 107340918B
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pressure sensor
resistor
input end
array substrate
pressure
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CN107340918A (en
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刘亮
卢峰
朱在稳
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/205—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using distributed sensing elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2268—Arrangements for correcting or for compensating unwanted effects
    • G01L1/2281—Arrangements for correcting or for compensating unwanted effects for temperature variations
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G06F3/04142—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G06F3/04144—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position using an array of force sensing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

The invention discloses an array substrate, a touch display panel and a touch display device, wherein the array substrate comprises a plurality of pressure sensors, and each pressure sensor comprises a first input end and a second input end; the first input end of each pressure sensor is electrically connected with the first power supply input end, and the second input end of each pressure sensor is electrically connected with the second power supply input end; a first connecting line is arranged between the first input end of each pressure sensor and the first power supply input end, and the first connecting line is provided with a first resistor; a second connecting wire is arranged between the second input end and the second power supply input end, and the second connecting wire is provided with a second wire resistor; the resistance of each pressure sensor is the same as the ratio of the sum of the corresponding first and second resistances. According to the technical scheme, the accuracy of pressure detection of the touch display panel is improved, and the difficulty of calibrating the pressure sensor is reduced.

Description

Array substrate, touch display panel and touch display device
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to an array substrate, a touch display panel and a touch display device.
Background
At present, a display panel with a touch function is widely used as an information input tool in various electronic devices, such as an information query machine in a hall of a public place, a computer and a mobile phone used by a user in daily life and work. Therefore, the user can operate the electronic equipment by only touching the mark on the touch display screen with fingers, dependence of the user on other input equipment such as a keyboard and a mouse is eliminated, and man-machine interaction is more direct, simple and convenient.
In order to better meet the user requirements, a pressure sensor for detecting the touch pressure of a user in the process of touching the touch display screen is usually arranged in the touch display screen, and the pressure sensor can acquire touch position information and also can acquire the size of the touch pressure, so that the application range of the touch display technology is enriched.
In order to detect the touch pressure at each position of the touch display screen, the touch display screen generally includes a plurality of pressure sensors disposed at different positions, each pressure sensor includes two input terminals, and the power input terminal provides a bias voltage to the corresponding pressure sensor through the input terminals of the pressure sensor. However, since a certain line resistance is provided between the input terminal of each pressure sensor and the corresponding power input terminal, and the line resistances corresponding to different pressure sensors are different, the resistances of different pressure sensors may be different, so that the bias voltage between the two input terminals of each pressure sensor is different for the same voltage input by the power input terminal. When the touch display screen generates the same deformation under the pressure effect, detection signals output by the pressure sensors are different, and the accuracy of touch display pressure detection is seriously influenced. In addition, each pressure sensor with the same deformation should output the same detection signal, and when the detection signals are different, the pressure sensors need to be calibrated, which also increases the calibration difficulty of the pressure sensors.
Disclosure of Invention
In view of this, the present invention provides an array substrate, a touch display panel and a touch display device, which, compared to the prior art, implement that when the voltages between the first power input terminal and the second power input terminal are the same, the bias voltage between the first input terminal and the second input terminal of each pressure sensor is the same, thereby improving the accuracy of pressure detection performed by the touch display panel and reducing the difficulty of calibrating the pressure sensors.
In a first aspect, an embodiment of the present invention provides an array substrate, including:
a plurality of pressure sensors, each pressure sensor comprising a first input and a second input; the first input end of each pressure sensor is electrically connected with a first power supply input end, and the second input end of each pressure sensor is electrically connected with a second power supply input end;
a first connection is arranged between the first input end of each pressure sensor and the first power supply input end, and the first connection is provided with a first resistor; a second connection is arranged between the second input end and the second power supply input end, and the second connection is provided with a second resistor;
the ratio of the resistance of each pressure sensor to the sum of the corresponding first and second resistances is the same.
In a second aspect, an embodiment of the present invention further provides a touch display panel, including the array substrate according to the first aspect.
In a third aspect, an embodiment of the present invention further provides a touch display device, including the touch display panel of the second aspect.
The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, wherein a first resistor of a first connection line between a first input end of each pressure sensor and a first power supply input end and a second resistor of a second connection line between a second input end of each pressure sensor and a second power supply input end are arranged to meet the condition that the ratio of the resistance of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same, so that when the voltages between the first power supply input end and the second power supply input end are the same, the divided voltages of each pressure sensor are the same because the ratio of the resistance of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same, namely the bias voltages between the first input end and the second power supply input end of each pressure sensor are the same. Aiming at the same deformation generated by the touch display panel under the action of pressure, the detection signals output by each pressure sensor are the same, so that the accuracy of pressure detection of the touch display panel is improved and the difficulty of calibrating the pressure sensors is reduced compared with the prior art.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic top view of an array substrate according to an embodiment of the present invention;
fig. 2 is an equivalent circuit diagram of a connection relationship of a pressure sensor according to an embodiment of the present invention;
FIG. 3 is an equivalent circuit diagram of another pressure sensor connection relationship provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of increasing the wire resistance according to an embodiment of the present invention;
fig. 5 is a schematic top view illustrating an array substrate according to another embodiment of the present invention;
fig. 6 is a schematic cross-sectional structure view of another array substrate according to an embodiment of the invention;
fig. 7 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
fig. 12 is a schematic structural diagram illustrating a relationship between a control switch and a pressure sensor according to an embodiment of the present invention;
FIG. 13 is a schematic structural diagram illustrating an alternative arrangement of a control switch and a pressure sensor according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a touch display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides an array substrate, which comprises a plurality of pressure sensors, wherein each pressure sensor comprises a first input end and a second input end, the first input end of each pressure sensor is electrically connected with a first power supply input end, the second input end of each pressure sensor is electrically connected with a second power supply input end, a first connecting wire is arranged between the first input end of each pressure sensor and the first power supply input end, the first connecting wire is provided with a first resistor, a second connecting wire is arranged between the second input end of each pressure sensor and the second power supply input end, the second connecting wire is provided with a second resistor, and the ratio of the resistor of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same.
In order to detect the touch pressure at each position of the touch display screen, the touch display screen generally includes a plurality of pressure sensors disposed at different positions, each pressure sensor includes a first input terminal and a second input terminal, and is electrically connected to the first power input terminal and the second power input terminal, and the first power input terminal and the second power input terminal provide bias voltage to the corresponding pressure sensor through the first input terminal and the second input terminal of the pressure sensor. However, since a certain line resistance is provided between the input end of each pressure sensor and the corresponding power input end, and the line resistances corresponding to different pressure sensors are different, the resistances of different pressure sensors may also be different, which results in that when the voltages between the first power input end and the second power input end are the same, the bias voltages between the two input ends of each pressure sensor are different, so that when the touch display screen is deformed under the pressure, the detection signals output by the pressure sensors are different, and the accuracy of the touch display pressure detection is affected. In addition, each pressure sensor with the same deformation should output the same detection signal, and when the detection signals are different, the pressure sensors need to be calibrated, so that the calibration difficulty of the pressure sensors is increased.
The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, wherein a first resistor of a first connection line between a first input end of each pressure sensor and a first power supply input end and a second resistor of a second connection line between a second input end of each pressure sensor and a second power supply input end are arranged to meet the condition that the ratio of the resistance of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same, so that when the voltages between the first power supply input end and the second power supply input end are the same, the divided voltages of each pressure sensor are the same because the ratio of the resistance of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same, namely the bias voltages between the first input end and the second power supply input end of each pressure sensor are the same. Aiming at the same deformation generated by the touch display panel under the action of pressure, the detection signals output by each pressure sensor are the same, so that the accuracy of pressure detection of the touch display panel is improved and the difficulty of calibrating the pressure sensors is reduced compared with the prior art.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic top view of an array substrate according to an embodiment of the present invention, and fig. 2 is an equivalent circuit diagram of a connection relationship of pressure sensors according to an embodiment of the present invention. Referring to fig. 1 and 2, the array substrate 10 includes a plurality of pressure sensors S, for example, a pressure sensor S1, a pressure sensor S1 includes a first input terminal a11 and a second input terminal a12, a first input terminal a11 and a first power input terminal V of the pressure sensor S1cc1Electrically connected to the second input terminal A12 and the second power input terminal Vcc2Electrically connected to the first input A11 of the pressure sensor S1 and the first power input Vcc1A first connecting line 11 is arranged between the first and second connecting lines 11, and the first connecting line 11 has a first resistor R11A second input terminal A12 and a second power input terminal Vcc2A second connecting wire 12 is arranged between the first connecting wire 12 and the second connecting wire 12 is provided with a second wire resistance R12. Wherein the ratio of the resistance of each pressure sensor S to the sum of the corresponding first and second resistances is the same.
Specifically, as shown in fig. 2, the pressure sensor S1 and the pressure sensor S2 are taken as examples, and the resistance R of the pressure sensor S1 is taken as an exampleS1Corresponding first resistor R11And a second resistor R12The ratio of the sum, the resistance R of the pressure sensor S2S2Corresponding first resistor R21And a secondWire resistor R22The ratio of the sums satisfies the following relationship:
Figure BDA0001338141060000061
the first power supply input terminal V can be setcc1And a second power supply input terminal Vcc2Has a voltage of VccThe voltage U between the first input A11 and the second input A12 of the pressure sensor S1in1Satisfies the following relation:
Figure BDA0001338141060000071
the voltage U between the first input A21 and the second input A22 of the pressure sensor S2in2The following relationship is satisfied:
Figure BDA0001338141060000072
combining the above three equations, the resistance R of the pressure sensor S1S1Corresponding first resistor R11And a second resistor R12The ratio of the sum is equal to the resistance R of the pressure sensor S2S2Corresponding first resistor R21And a second resistor R22The ratio of the sum, the voltage U between the first input A11 and the second input A12 of the pressure sensor S1in1Equal to the voltage U between the first input A21 and the second input A22 of the pressure sensor S2in2The method is applied to all the pressure sensors S, namely, the bias voltage between the first input end and the second input end of each pressure sensor S is the same, the detection signal output by each pressure sensor S is the same for the same deformation generated by the touch display panel under the action of pressure, and compared with the same deformation generated by the touch display panel under the action of pressure in the prior art, the pressure obtained according to different detection signals caused by different detection signals output by each pressure sensor is different, so that the problem of inaccurate pressure detection of the touch display panel is solved, and the method improves the accuracy of the pressure detection of the touch display panelThe accuracy of pressure detection of the touch display panel reduces the difficulty of calibrating the pressure sensor S.
Alternatively, fig. 3 is an equivalent circuit diagram of another pressure sensor provided in the embodiment of the present invention. In connection with fig. 1 and 3, there is a common portion for the first and second wires corresponding to at least two pressure sensors S, here illustratively provided that there is a common portion for the first and second wires corresponding to pressure sensors S3 and S4. When the common portion (the first power input terminal V in FIG. 3) exists in the first connection lines corresponding to the pressure sensors S3 and S4cc1Part to node a) and the second connection presents a common part (second supply input V in fig. 3)cc2Portion to node b), the first resistance of the first connection 31 corresponding to the pressure sensor S3 is equal to Ra1And Ra2Sum, the second resistance of the second connection 32 being equal to Rb1And Rb2In sum, the first resistance of the first connection 41 corresponding to the pressure sensor S4 is equal to Ra1And Ra3Sum, the second resistance of the second connection 42 being equal to Rb1And Rb3And (4) summing.
Alternatively, the resistance of the pressure sensor S may be proportional to the distance from the first input of the pressure sensor S to the first power input, or the distance from the second input of the pressure sensor S to the second power input.
Optionally, as shown in fig. 1, the array substrate 10 may include a display area AA and a peripheral circuit area NAA disposed around the display area AA, the pressure sensors S may be disposed in the peripheral circuit area NAA of the array substrate 10, the array substrate 10 may further include a driving chip 13 disposed in the peripheral circuit area NAA, the driving chip 13 is configured to provide display control signals, data signals and the like required by the touch display panel, and the driving chip 13 may also provide bias voltages to the first input terminal and the second input terminal of each pressure sensor S, that is, the first power input terminal and the second power input terminal may be integrated in the driving chip.
Illustratively, in conjunction with fig. 1 and 3, the positions of the pressure sensors S3 and S4 in the array substrate 10 can be as shown in fig. 1, and the pressure sensors S that are farther from the driver chip can be referred to as distal pressure sensorsThe pressure sensor S closer to the driver chip may be referred to as a proximal pressure sensor, and the pressure sensor S3 is a proximal pressure sensor, the pressure sensor S4 is a distal pressure sensor, and the following embodiments exemplarily refer to the pressure sensor S3 as the proximal pressure sensor, and the pressure sensor S4 as the distal pressure sensor. Since the longer the length of the wiring, the greater the wiring resistance of the wiring, and the first input A41 of the pressure sensor S4 to the first power supply input Vcc1And a second input a42 to a second power supply input V of the pressure sensor S4cc2Than the first input a31 of the pressure sensor S3 to the first power supply input Vcc1And the second input a32 of the pressure sensor S3 to the second power supply input Vcc2Is longer, so that the resistance R of the pressure sensor S4 is set to satisfy the condition that the ratio of the resistance of each pressure sensor S to the sum of the corresponding first and second resistances is the sameS4Greater than the resistance R of the pressure sensor S3S3This conclusion is applied to the pressure sensor S used in the array substrate 10, i.e., the resistance of the pressure sensor S and the first input terminal of the pressure sensor S to the first power supply input terminal Vcc1Or from the second input of the pressure sensor S to the second supply input Vcc2Is proportional to the distance of (c). For example, if the pressure sensor S is a coiled pressure sensor, the resistance R of the pressure sensor S4 may be increased by increasing the number of turns of the coilS4The resistance R of the pressure sensor S4 may be increased in other waysS4The embodiment of the present invention is not limited thereto.
Alternatively, the sum of the first and second resistances corresponding to each pressure sensor may be set to be equal. In consideration of simple design of actual products, the resistance of each pressure sensor disposed in the array substrate is generally made the same, and since the ratio of the resistance of each pressure sensor to the sum of the first resistance and the second resistance corresponding thereto is equal, the sum of the first resistance and the second resistance corresponding to each pressure sensor is set to be equal. Referring to fig. 1 and 3, since the lengths of the first wire 41 and the second wire 42 corresponding to the pressure sensor S4 are greater than the lengths of the first wire 31 and the second wire 32 corresponding to the pressure sensor S3, the ratio of the sum of each pressure sensor and the first wire resistance and the second wire resistance corresponding thereto may be equal when the resistances of each pressure sensor are the same by increasing the first wire resistance of the first wire 31 corresponding to the pressure sensor S3 or the second wire resistance corresponding to the second wire 32.
For example, the first resistance of the first wire 31 or the second resistance of the second wire 32 corresponding to the pressure sensor S3 may be increased by increasing the number of coil turns of the first wire 31 or the second wire 32 corresponding to the pressure sensor S3 or decreasing the cross-sectional area of the first wire 31 or the second wire 32 corresponding to the pressure sensor S3. Fig. 4 is a schematic structural diagram of increasing the wire resistance of the connection according to the embodiment of the present invention, and is described with reference to fig. 3 and 4, taking an example that a common portion exists between the first connection and the second connection corresponding to the pressure sensor S3 and the pressure sensor S4, the circuit connection structure of the pressure sensor shown on the right side of fig. 4 is obtained by dividing both the first connection 31 and the second connection 32 corresponding to the pressure sensor S3, as compared with the circuit connection structure of the pressure sensor shown on the left side of fig. 4, and the manner of dividing the connection corresponds to increasing the wire resistance R in comparison with fig. 3 and 4a2And Rb2And the first resistance of the first connection line 31 corresponding to the pressure sensor S3 is equal to Ra1And Ra2Sum, the second resistance of the second connection 32 being equal to Rb1And Rb2The sum of the first and second resistances corresponding to the pressure sensor S3 is increased. It should be noted that the first resistor and the second resistor corresponding to the pressure sensor S3 may also be added in other forms, which is not limited in the embodiment of the present invention.
Optionally, the sum of the first line resistance and the second line resistance corresponding to the pressure sensor may also be inversely proportional to the distance from the first input end of the pressure sensor to the first power input end, or the distance from the second input end of the pressure sensor to the second power input end. Referring to fig. 3, since the ratio of the resistance of each pressure sensor to the sum of the first and second resistances corresponding thereto is the same, it is necessary to set the resistance R of the pressure sensor S3S3Is greater thanResistance R of pressure sensor S4S4. Similarly, referring to fig. 1 and 3, since the lengths of the first connection line 41 and the second connection line 42 corresponding to the pressure sensor S4 are greater than the lengths of the first connection line 31 and the second connection line 32 corresponding to the pressure sensor S3, the sum of the first resistance and the second resistance corresponding to the pressure sensor S3 may be inversely proportional to the distance from the first input terminal of the pressure sensor to the first power input terminal or the distance from the second input terminal of the pressure sensor to the second power input terminal by increasing the first resistance of the first connection line 31 or the second resistance of the second connection line 32 corresponding to the pressure sensor S3. The first wire resistance or the second wire resistance corresponding to the pressure sensor S3 can be added in the manner provided in the above embodiments, and will not be described herein.
Optionally, fig. 5 is a schematic top view structure diagram of another array substrate according to an embodiment of the present invention. Different from fig. 1, fig. 5 exemplarily sets the pressure sensors S in the opaque region (not shown) of the display area AA of the array substrate 10, and exemplarily, when the touch display panel is a liquid crystal touch display panel, the pressure sensors S may be disposed corresponding to the black matrix in the color film substrate, and the structure shown in the figure also satisfies that the ratio of the resistance of each pressure sensor S to the sum of the first line resistance and the second line resistance corresponding thereto is the same, so as to achieve that the voltages of the first input end and the second input end of each pressure sensor S are the same, and for the same deformation generated by the touch display panel under the action of pressure, the detection signal output by each pressure sensor is the same, which improves the accuracy of pressure detection performed by the touch display panel and reduces the difficulty in calibrating the pressure sensors, compared with the prior art. For example, when the touch display panel is an organic light emitting electro-touch display panel, the pressure sensor S may be disposed at a non-opening area of the display area AA.
Optionally, fig. 6 is a schematic cross-sectional structure diagram of an array substrate according to an embodiment of the present invention, and with reference to fig. 2 and fig. 6, the array substrate may further include a plurality of thin film transistors 30, and each thin film transistor 30 sequentially includes an active layer 301, a gate 302, and a source 303 and a drain 304 that are disposed in the same layer along a direction away from the substrate 40, for example, a material constituting the pressure sensor S may be a semiconductor material such as amorphous silicon or polysilicon, or may be a metal material, and then the pressure sensor S may be disposed in the same layer as the active layer 301 or any metal layer of the thin film transistor 30, where the pressure sensor S is disposed in the same layer as the gate 302 of the thin film transistor 30, or may be disposed in the same layer as the source 303 or the drain 304. The first connection line and the second connection line corresponding to the pressure sensor S may also be disposed in the same layer as any metal electrode of the gate, the source, or the drain (not shown in fig. 6), so as to simplify the manufacturing process of the display panel.
Optionally, fig. 7 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention. As shown in FIG. 7, each pressure sensor S may include a first sense resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4. First induction resistor R1First end a1 and fourth sensing resistor R4First terminal a4 and first power input terminal Vcc1Electrically connected to a first inductive resistor R1Second terminal b1 and second sensing resistor R2First end a2 and first sensing signal measuring end V+Electrically connected to a fourth sense resistor R4Second terminal b4 and third sense resistor R3First end a3 and second sensing signal measuring end V-Electrically connected to a second inductive resistor R2Second terminal b2 and third sense resistor R3Second terminal b3 and second power input terminal Vcc2And (6) electrically connecting. Illustratively, the first power supply input terminal Vcc1The input voltage may be, for example, a positive voltage, the second supply input terminal Vcc2The input voltage may be, for example, a negative voltage or a zero voltage, and for example, the second power supply input terminal V may be connected tocc2And (4) grounding.
Specifically, the pressure sensor S shown in FIG. 7 is a Wheatstone bridge structure with a first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Connected into a quadrilateral ABCD, called the four arms of the bridge. The diagonal line CD of the quadrilateral ABCD is connected with a galvanometer G, and two poles of the galvanometer G are first induction signalsNumber measuring terminal V+And a second induction signal measuring terminal V-The diagonal line AB of the quadrilateral ABCD is respectively connected with the first power supply input end Vcc1And a second power supply input terminal Vcc2. The pressure sensor S can also comprise a first output end and a second output end, the position corresponding to the point A is the first input end of the pressure sensor S, the position corresponding to the point B is the second input end of the pressure sensor S, the position corresponding to the point C is the first output end of the pressure sensor S, and the position corresponding to the point D is the second output end of the pressure sensor S.
When the first power supply input terminal Vcc1And a second power supply input terminal Vcc2When the voltage on the bridge circuit has a certain difference value, all branches in the bridge circuit have current to pass through. First induction resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Satisfy the requirement of
Figure BDA0001338141060000121
When the potentials between two points of CD are equal, the current flowing through the galvanometer G is zero, the pointer of the galvanometer G indicates zero scale, the bridge is in a balanced state, and the CD is called
Figure BDA0001338141060000122
The bridge balance condition. When the first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4When the bridge balance condition is not met, the potentials between two points of the CD are not equal, the current flowing through the galvanometer G is not 0, the pointer of the galvanometer G deflects and outputs a corresponding signal value, and the pressure of the pressure sensor S is detected according to the signal value output by the galvanometer G.
Taking the pressure sensor S1 shown in FIG. 2 as an example, the resistance R of the pressure sensor S1S1And a first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4The following relationship is satisfied:
Figure BDA0001338141060000131
can be adjusted by adjusting the first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Increasing or decreasing the resistance R of the pressure sensor S1S1The resistance of each pressure sensor is equal to the ratio of the sum of the first line resistance and the second line resistance corresponding to the resistance, the voltage of the first input end and the voltage of the second input end of each pressure sensor are equal, the detection signals output by each pressure sensor are equal aiming at the same deformation generated by the touch display panel under the action of pressure, the accuracy of pressure detection of the touch display panel is improved, and the difficulty of calibrating the pressure sensors is reduced.
Taking the pressure sensors S of the structure shown in fig. 7 as an example, each pressure sensor S may include a first output terminal C and a second output terminal D, and a voltage U between the first input terminal a and the second input terminal B of each pressure sensor S is applied under pressureinAnd a first power supply input terminal Vcc1And a second power supply input terminal Vcc2Voltage V betweenccThe following relationship is satisfied:
Figure BDA0001338141060000132
wherein θ is a temperature coefficient of the first wire resistor or the second wire resistor corresponding to the pressure sensor S, Δ T is a temperature disturbance applied to the first wire resistor or the second wire resistor, GF is a strain sensitive parameter of the pressure sensor S and is a strain of the pressure sensor S, and U isoutIs the voltage between the first output terminal C and the second output terminal D when no pressure acts.
The above formula considers not only the temperature disturbance factor but also the process disturbance factor, and referring to the structure of the pressure sensor S shown in fig. 7, ignoring the influence factor of the manufacturing process, when the touch display panel has no pressure effect, the first sensing resistor R is the first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Should satisfy
Figure BDA0001338141060000141
The first output terminal C and the second output terminal D of the pressure sensor S have the same potential, that is, the current flowing through the galvanometer G is zero, and the bridge is in a balanced state. However, due to the manufacturing process, the first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4May not be exactly the same as the desired value, and there may be a greater or lesser error, resulting in the bridge configuration not satisfying the bridge balancing condition, the voltage between the first output terminal C and the second output terminal D of the pressure sensor S is not 0, and U is setoutA voltage between the first output terminal C and the second output terminal D when no pressure is applied, which voltage is not 0, then
Figure BDA0001338141060000142
The process disturbance of the pressure sensor S can be represented, and the above formula means that the change of the line resistance caused by the process disturbance and the temperature disturbance is smaller than the resistance change of the pressure sensor S under the pressure action, so as to ensure that the pressure sensor S can accurately detect the pressure for pressing the touch display panel.
Specifically, referring to fig. 2, the derivation process of the above formula is described by taking the pressure sensor S1 and the corresponding branches where the first connection line 11 and the second connection line 12 are located as an example:
first resistor R11And a second resistor R12The change of the resistance caused by the process disturbance and the temperature disturbance is smaller than the change Δ R of the resistance generated by the pressure sensor S1 under the pressure, that is:
Figure BDA0001338141060000143
strain sensitive parameter GF of pressure sensor S1, strain of pressure sensor S1 and resistance R of pressure sensor S1S1Satisfies the following conditions:
Figure BDA0001338141060000144
setting the voltage division ratio of the first resistor R11 and the second resistor R12 in the pressure sensor S1 and the corresponding branch where the first connecting line 11 and the second connecting line 12 are located to be η, η satisfies:
Figure BDA0001338141060000151
then 1- η satisfies:
Figure BDA0001338141060000152
substituting equations (1-3) (1-4) (1-5) into equation (1-2) can yield:
Figure BDA0001338141060000153
then 1- η satisfies:
Figure BDA0001338141060000154
and 1- η represents the resistance R of the pressure sensor S1S1At the pressure division ratio of the pressure sensor S1 and the corresponding branch where the first connection 11 and the second connection 12 are located, 1- η further satisfies:
Figure BDA0001338141060000155
substituting the formula (1-7) into the formula (1-6) to obtain the formula (1-1).
Optionally, fig. 8 is a schematic structural diagram of another pressure sensor provided in the embodiment of the present invention. In addition to the structure of the pressure sensor S shown in fig. 7, the display panel may include a first extending direction 100 and a second extending direction 200, and the first extending direction 100 and the second extending direction 200 are arranged to cross each other. A component of an extension length of the first sense resistor R1 from the first end a1 to the second end b1 in the first extending direction 100 may be greater than a component in the second extending direction 200, a component of an extension length of the second sense resistor R2 from the first end a2 to the second end b2 in the second extending direction 200 may be greater than a component in the first extending direction 100, a component of an extension length of the third sense resistor R3 from the first end a3 to the second end b3 in the first extending direction 100 may be greater than a component in the second extending direction 200, and a component of an extension length of the fourth sense resistor R4 from the first end a4 to the second end b4 in the second extending direction 200 may be greater than a component in the first extending direction 100.
In particular, since the pressure sensor S shown in fig. 7 generally requires the first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4The deformation experienced being different, e.g. the first sense resistor R1And a third sense resistor R3Sense compression deformation, second sense resistor R2And a fourth sense resistor sensing R4Tensile deformation, therefore, the first sense resistance R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Spatially separated, such that the first sense resistor R is caused to change when the local temperature changes1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4In different temperature environments, the temperature is opposite to the first induction resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Different influences are generated to influence the accuracy of pressure detection of the pressure sensor S, so that the accuracy of detecting the acceleration of the moving object where the display panel is located is reduced.
With reference to fig. 1, 2 and 8, a pressure sensor S having the structure shown in fig. 8 is provided, via a first power supply input terminal Vcc1And a second power supply input terminal Vcc2For the first induction resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4After the electric signal is applied, when no pressure acts, the pressure induction bridge meets the bridge balance condition, and is in a balance state with a first sensorResponse signal measuring terminal V+And a first induction signal measuring terminal V-The signal value of the output in between is zero; when the touch display panel is pressed by pressure, the first sensing resistor RlAnd a third sense resistor R3A second sensing resistor R for sensing the strain in the first extending direction 100 and the corresponding resistance value thereof2And a fourth sense resistor R4The strain induced in the second extending direction 200 is correspondingly changed in corresponding resistance, and the strain directions of the first extending direction 100 and the second extending direction 200 are different, RlAnd R2And R3And R4The resistance values of the first sensing signal measuring terminal V are different, at the moment, the pressure sensing bridge does not meet the bridge balance condition, the pressure sensing bridge is out of balance, and the first sensing signal measuring terminal V+And a first induction signal measuring terminal V-The output signal value is not zero, and the pressure applied to the pressure sensor S can be obtained according to the signal value, so that the pressure sensing function of the touch display panel is realized.
In contrast to the pressure sensor S having the structure shown in fig. 7, the pressure sensor having the structure shown in fig. 8 is configured by providing the first sensing resistor R1And a third sense resistor R3Sensing strain in the first extension direction 100, and a second sensing resistor R2And a fourth sense resistor R4Inducing strain in the second extending direction 200 to make the first sensing resistor R1A second sensing resistor R2And a third sense resistor R3And a fourth sense resistor R4May be distributed in the same place in space or in a relatively small area. Further making the first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4The temperature change is synchronized, the influence of temperature difference is eliminated, and the accuracy of pressure induction of the touch display panel is improved.
Taking the pressure sensor S1 shown in fig. 2 as an example, the resistance R of the pressure sensor S1 is set for the pressure sensor S with the structure shown in fig. 8S1And a first sensing resistor R1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Still satisfies:
Figure BDA0001338141060000171
the first induction resistor R can be adjusted1A second sensing resistor R2A third sensing resistor R3And a fourth sense resistor R4Increasing or decreasing the resistance R of the pressure sensor S1S1The resistance of each pressure sensor is equal to the ratio of the sum of the first line resistance and the second line resistance corresponding to the resistance, the voltage of the first input end and the voltage of the second input end of each pressure sensor are equal, the detection signals output by each pressure sensor are equal aiming at the same deformation generated by the touch display panel under the action of pressure, the accuracy of pressure detection of the touch display panel is improved, and the difficulty of calibrating pressure sensing is reduced.
Alternatively, the pressure sensor may be in the form of a block made of a semiconductor material and having a shape of a polygon including at least four sides. The pressure sensor may include a first connection end, a second connection end, a third connection end, and a fourth connection end. The first connecting end is an input end and is electrically connected with the first power supply input end; the second connecting end is a second input end and is electrically connected with the second power supply input end; the third connecting end is a first output end and is electrically connected with the first induction signal measuring end; the fourth connecting end is a second output end and is electrically connected with the second induction signal measuring end. The first connecting end, the second connecting end, the third connecting end and the fourth connecting end are arranged on four polygonal edges respectively, the edge where the first connecting end is located is not connected with the edge where the second connecting end is located, and the edge where the third connecting end is located is not connected with the edge where the fourth connecting end is located. For example, fig. 9 illustrates the pressure sensor S as a square, but the shape of the pressure sensor S is not limited in the embodiment of the present invention.
For example, as shown in fig. 9, the pressure sensor S may have a quadrilateral shape, and the first connection end 201, the second connection end 202, the third connection end 203, and the fourth connection end 204 may be a first side 221, a second side 222, a third side 223, and a fourth side 224 of the pressure sensor S, respectively, and the third side 222, the third side 223, and the fourth side 224 of the pressure sensor S, respectivelyOne side 221 is disposed opposite to the second side 222, the third side 223 is disposed opposite to the fourth side 224, and the first terminal end 201 is a first input end A of the pressure sensor S and a first power input end Vcc1Electrically connected to the second terminal 202, which is the second input terminal B of the pressure sensor S and the second power input terminal Vcc2Electrically connected to the third connecting terminal 203, which is the first output terminal C of the pressure sensor S and the first sensing signal measuring terminal V+Electrically connected, the fourth connecting terminal 204 is a second output terminal D of the pressure sensor S and a second sensing signal measuring terminal V-And (6) electrically connecting.
In particular, the first power supply input terminal Vcc1And a second power supply input terminal Vcc2Bias voltage can be applied to the pressure sensor S through the first connection end 201 and the second connection end 202 of the pressure sensor S, when pressure presses the touch display panel, the resistance value of the strain resistor disc 211 of the pressure sensor S changes, and the corresponding first sensing signal measurement end V of the strain resistor disc changes+And a second induction signal measuring terminal V-When the output strain voltage changes correspondingly, the pressure of the pressing part 102 received by the pressure sensor S can be detected by detecting the change of the voltage on the strain resistance sheet 211, so as to realize the pressure sensing function of the touch display panel. The resistance value of the pressure sensor S shown in fig. 9 is the resistance value of the strain resistor disc 211, and it is ensured that the resistance value of the strain resistor disc in each pressure sensor S is the same as the ratio of the sum of the first line resistor and the second line resistor corresponding to the pressure sensor, so as to implement the purpose of implementing the first power input end Vcc1And a second power supply input terminal Vcc2The same voltage, the voltages of the first input end a and the second input end B of each pressure sensor S are the same, and for the same deformation generated by the touch display panel under the action of pressure, the detection signals output by each pressure sensor S are the same, so that the accuracy of pressure detection performed by the touch display panel is improved, and the difficulty of calibrating the pressure sensors S is reduced.
Alternatively, the pressure sensor may be a block-shaped, made of a semiconductor material, including a polygonal intrinsic portion shaped to include at least four sides, and a first protrusion, a second protrusion, a third protrusion, and a fourth protrusion respectively disposed on the four sides of the polygon. The edge where the first protruding part is located is not connected with the edge where the second protruding part is located, and the edge where the third protruding part is located is not connected with the edge where the fourth protruding part is located. The first protruding part is a first input end and is electrically connected with the first power supply input end; the second protruding part is electrically connected with the second power supply input end for the second input end; the third protruding part is a first output end of the pressure sensor and is electrically connected with the first induction signal measuring end; the fourth protruding part is a second output end of the pressure sensor and is electrically connected with the second induction signal measuring end. For example, fig. 10 illustrates the pressure sensor S as a square, but the shape of the pressure sensor S is not limited in the embodiment of the present invention.
The pressure sensors S with the structure shown in fig. 10 have the same resistance as the sum of the resistances of the strain resistance sheet 211 and the four protrusions, so that the ratio of the sum of the resistances of the strain resistance sheet and the four protrusions in each pressure sensor S to the sum of the first line resistance and the second line resistance corresponding to the pressure sensor S is the same, the voltages at the first input end and the second input end of each pressure sensor are the same, and the detection signals output by each pressure sensor S are the same for the same deformation of the touch display panel under the pressure effect, so that the accuracy of pressure detection performed by the touch display panel is improved, and the difficulty in calibrating the pressure sensors S is reduced.
Unlike fig. 9, fig. 10 independently provides the first connection terminal 201, the second connection terminal 202, the third connection terminal 203, and the fourth connection terminal 204 of fig. 9 as protrusions on four sides of the quadrangular pressure sensor S, respectively. The first protrusion 241 is set as the first input terminal A and the first power input terminal Vcc1Electrically connected to the second power input terminal V via the second protrusion 242 as the second input terminal Bcc2Electrically connected to the third protrusion 243, which is the first output terminal C and the first sensing signal measuring terminal V+Electrically connected to the fourth protrusion 244, which is the second output terminal D, and the second sensing signal measuring terminal V-And (6) electrically connecting. The principle of pressure detection is the same as that of the pressure sensor shown in fig. 9, and the description thereof is omitted. For example, a first protrusion 241, a second protrusion 242, a third protrusion 243, and a fourth protrusion may be providedSince the portion 244 is made of the same material as the strain resistor 211 of the pressure sensor S, schottky barriers between the first protruding portion 241, the second protruding portion 242, the third protruding portion 243, and the fourth protruding portion 244 and the strain resistor 211 of the pressure sensor S can be effectively reduced, and the detection accuracy of the pressure sensor S can be further improved.
Optionally, fig. 11 is a schematic structural diagram of another pressure sensor provided in the embodiment of the present invention. Fig. 11 is a schematic view of the pressure sensor S shown in fig. 9, and a hollow area 212 may be disposed on the pressure sensor S. Since the strain resistance chip 211 in the pressure sensor S is a whole-chip resistor, the through area of the strain resistance chip 211 is reduced by the arrangement of the hollow area 212, that is, the resistance of the pressure sensor S is increased. The area of the hollowed-out region 212 of the pressure sensor S and the distance from the first input A to the first power input V of the pressure sensor Scc1Or from the second input B of the pressure sensor S to the second supply input Vcc2Is proportional to the distance of (c). Specifically, referring to fig. 3 and 11, the first resistor R corresponding to the pressure sensor S4 is used41And a second resistor R42Is greater than the first resistance R corresponding to the pressure sensor S331And a second resistor R32Therefore, in order to satisfy the condition that the ratio of the resistance of each pressure sensor to the sum of the first resistance and the second resistance corresponding to the resistance is the same, the resistance R of the pressure sensor S4 is setS4Greater than the resistance R of the pressure sensor S3S3The resistance R of the pressure sensor S4 can be increased by increasing the area of the hollowed-out region 212S4I.e. the area of the hollowed-out region 212 of the pressure sensor and the voltage from the first input terminal of the pressure sensor to the first power input terminal Vcc1Or from the second input of the pressure sensor to the second supply input Vcc2Is proportional to the distance of (c).
Optionally, the array substrate may further include a plurality of control switches, and each control switch may be disposed corresponding to one pressure sensor and configured to control an operating state of the pressure sensor. Fig. 12 is a schematic structural diagram of an arrangement relationship between a control switch and a pressure sensor according to an embodiment of the present invention, where a pressure sensor S with the structure shown in fig. 9 is taken as an example for description, and for example, a material forming the pressure sensor S may be a metal material, a metal layer 142 may be separately formed above the pressure sensor S as a control terminal 141 of the control switch 14, the separately formed metal layer 142 and the pressure sensor S are arranged in an insulating manner, the separately formed metal layer 142 and the pressure sensor S form a structure similar to a thin film transistor, the separately formed metal layer 142 corresponds to a gate layer of the thin film transistor and serves as a control terminal 141 of the control switch 14, the pressure sensor S corresponds to a source-drain layer of the thin film transistor, and a first input terminal a and a second input terminal B of the pressure sensor S may be controlled by the control terminal 141 of the control switch 14, or the first output end C and the second output end D are connected or disconnected, so that the pressure sensor S in the touch display panel is prevented from being always in an electrified working state, and the power consumption of the touch display panel when pressure detection is not needed is reduced.
For example, fig. 13 is a schematic structural diagram of an arrangement relationship between a control switch and a pressure sensor according to an embodiment of the present invention, taking the pressure sensor S with the structure shown in fig. 7 as an example, the control switch 14 may also be a separately arranged switching tube 143, the switching tube 143 may be connected in series with a first connection line or a second connection line, and the control terminal 141 (i.e., a gate of a thin film transistor) of the control switch 14 is used to implement the first power input terminal Vcc1To the first input A of the pressure sensor, or to the second supply input Vcc2And the connection or disconnection between the pressure sensor S and the second input end B of the pressure sensor S is controlled, so that the pressure sensor S in the touch display panel is prevented from being always in a power-on working state, and the power consumption of the touch display panel when pressure detection is not needed is reduced.
Optionally, the array substrate may further include a plurality of shift registers in the peripheral circuit region, each shift register includes a gate signal output terminal, and the gate signal output terminal may be electrically connected to the control switch. For example, referring to fig. 13, a gate signal output end of the shift register may be electrically connected to the control end 141 of the control switch 14, and the control on and off of the control switch 14 is realized through an electrical signal on the gate signal output end of the shift register, so as to prevent the pressure sensor S in the touch display panel from being in a power-on working state all the time, and reduce power consumption of the touch display panel when pressure detection is not needed. Illustratively, the gate signal output end of the shift register can also be electrically connected with the gate of a thin film transistor electrically connected with the pixel unit in the display area of the array substrate, so as to provide a step-by-step scanning signal to the pixel unit in the display area of the array substrate.
It should be noted that the drawings of the embodiments of the present invention only show the size of each element and the thickness of each film layer by way of example, and do not represent the actual size of each element and each film layer in the display panel.
The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, wherein a first resistor of a first connection line between a first input end of each pressure sensor and a first power supply input end and a second resistor of a second connection line between a second input end of each pressure sensor and a second power supply input end are arranged to meet the condition that the ratio of the resistance of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same, so that when the voltages between the first power supply input end and the second power supply input end are the same, the divided voltages of each pressure sensor are the same because the ratio of the resistance of each pressure sensor to the sum of the corresponding first resistor and the corresponding second resistor is the same, namely the bias voltages between the first input end and the second power supply input end of each pressure sensor are the same. Aiming at the same deformation generated by the touch display panel under the action of pressure, the detection signals output by each pressure sensor are the same, so that the accuracy of pressure detection of the touch display panel is improved and the difficulty of calibrating the pressure sensors is reduced compared with the prior art.
Fig. 14 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention. As shown in fig. 14, the touch display panel 15 includes the array substrate 10 in the above embodiments, so that the touch display panel 15 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiments, and further description is omitted here. For example, the touch display panel 15 may be an organic light emitting display panel or a liquid crystal display panel.
Fig. 15 is a schematic structural diagram of a touch display device according to an embodiment of the present invention. As shown in fig. 15, the touch display device 16 includes the touch display panel 15 in the above embodiments, so that the touch display device 16 provided in the embodiments of the present invention also has the beneficial effects described in the above embodiments, and further description is omitted here. For example, the touch display device 16 may be an electronic display device such as a mobile phone, a computer, or a television.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (17)

1. An array substrate, comprising:
a plurality of pressure sensors, each pressure sensor comprising a first input and a second input; the first input end of each pressure sensor is electrically connected with a first power supply input end, and the second input end of each pressure sensor is electrically connected with a second power supply input end;
a first connection is arranged between the first input end of each pressure sensor and the first power supply input end, and the first connection is provided with a first resistor; a second connection is arranged between the second input end and the second power supply input end, and the second connection is provided with a second resistor;
at least two first connecting lines and second connecting lines corresponding to the pressure sensors share a common part;
the ratio of the resistance of each pressure sensor to the sum of the corresponding first and second resistances is the same.
2. The array substrate of claim 1, wherein the resistance of the pressure sensor is proportional to the distance from the first input terminal of the pressure sensor to the first power input terminal, or the distance from the second input terminal of the pressure sensor to the second power input terminal.
3. The array substrate of claim 1, wherein the sum of the first and second resistances for each of the pressure sensors is equal.
4. The array substrate of claim 1, wherein the sum of the first and second resistances of the pressure sensor is inversely proportional to the distance from the first input terminal of the pressure sensor to the first power input terminal or the distance from the second input terminal of the pressure sensor to the second power input terminal.
5. The array substrate of claim 1, wherein the pressure sensor comprises:
the device comprises a first induction resistor, a second induction resistor, a third induction resistor and a fourth induction resistor;
the first end of first sense resistor and the first end of fourth sense resistor is connected with first power input end electricity, the second end of first sense resistor and the first end of second sense resistor is connected with first sensing signal measurement end electricity, the second end of fourth sense resistor and the first end of third sense resistor is connected with second sensing signal measurement end electricity, the second end of second sense resistor and the second end of third sense resistor is connected with second power input end electricity.
6. The array substrate of claim 5,
the array substrate comprises a first extending direction and a second extending direction, and the first extending direction and the second extending direction are arranged in a crossed mode;
the component of the extension length of the first sensing resistor from the first end to the second end in the first extension direction is larger than the component of the extension length of the second sensing resistor from the first end to the second end in the second extension direction, the component of the extension length of the third sensing resistor from the first end to the second end in the first extension direction is larger than the component of the extension length of the third sensing resistor in the second extension direction, and the component of the extension length of the fourth sensing resistor from the first end to the second end in the second extension direction is larger than the component of the extension length of the fourth sensing resistor in the first extension direction.
7. The array substrate of claim 1,
the pressure sensor is in a block shape, is made of semiconductor materials, and is in a polygon shape at least comprising four sides;
the pressure sensor comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end; the first connecting end is the input end and is electrically connected with the first power supply input end; the second connecting end is the second input end and is electrically connected with the second power supply input end; the third connecting end is the first output end and is electrically connected with the first induction signal measuring end; the fourth connecting end is the second output end and is electrically connected with the second induction signal measuring end; the first connecting end, the second connecting end, the third connecting end and the fourth connecting end are respectively arranged on four sides of the polygon, the side where the first connecting end is located is not connected with the side where the second connecting end is located, and the side where the third connecting end is located is not connected with the side where the fourth connecting end is located.
8. The array substrate of claim 7, wherein the pressure sensor comprises a hollowed-out region;
the area of the hollowed-out area of the pressure sensor is in direct proportion to the distance from the first input end of the pressure sensor to the first power input end, or the distance from the second input end of the pressure sensor to the second power input end.
9. The array substrate of claim 1,
the pressure sensor is in a block shape, is made of a semiconductor material, and comprises a polygonal intrinsic part with a shape at least comprising four sides, and a first protruding part, a second protruding part, a third protruding part and a fourth protruding part which are respectively arranged on the four sides of the polygon; the edge where the first protruding part is located is not connected with the edge where the second protruding part is located, and the edge where the third protruding part is located is not connected with the edge where the fourth protruding part is located;
the first protruding part is the first input end and is electrically connected with the first power supply input end; the second protruding part is the second input end and is electrically connected with the second power supply input end; the third protruding part is a first output end of the pressure sensor and is electrically connected with a first induction signal measuring end; the fourth protruding part is a second output end of the pressure sensor and is electrically connected with the second induction signal measuring end.
10. The array substrate of claim 9, wherein the intrinsic portion, the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion are made of the same material.
11. The array substrate of claim 1, wherein each of the pressure sensors further comprises a first output and a second output;
under the action of pressure, the voltage U between the first input end and the second input end of each pressure sensorinAnd a voltage V between the first power supply input terminal and the second power supply input terminalccThe following relationship is satisfied:
Figure FDA0002666990300000041
wherein θ is a temperature coefficient of the first wire resistor or the second wire resistor, Δ T is a temperature disturbance applied to the first wire resistor or the second wire resistor, GF is a strain sensitive parameter of the pressure sensor, strain of the pressure sensor, and U isoutThe voltage between the first output end and the second output end when no pressure acts is obtained.
12. The array substrate of claim 1, comprising a display area and a peripheral circuit area disposed around the display area; the pressure sensor is positioned in the peripheral circuit area or the light-tight area of the display area.
13. The array substrate of claim 1, further comprising:
and each control switch is arranged corresponding to one pressure sensor and is used for controlling the working state of the pressure sensor.
14. The array substrate of claim 13, comprising a display area and a peripheral circuit area disposed around the display area;
the array substrate further comprises a plurality of shift registers positioned in the peripheral circuit area, each shift register comprises a grid signal output end, and the grid signal output ends are electrically connected with the control switches.
15. The array substrate of claim 1, further comprising:
the thin film transistors comprise grid electrodes and source and drain electrodes; the first connecting line and the second connecting line are arranged on the same layer with the grid electrode or the source and drain electrodes.
16. A touch display panel comprising the array substrate according to any one of claims 1 to 15.
17. A touch display device comprising the touch display panel according to claim 16.
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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107656650B (en) * 2017-09-30 2020-08-07 厦门天马微电子有限公司 Display substrate, display panel and display device thereof
JP6993168B2 (en) * 2017-10-18 2022-01-13 株式会社ジャパンディスプレイ Display device and touch panel device
CN108426659B (en) * 2018-01-03 2020-08-25 厦门天马微电子有限公司 Pressure sensor detection circuit and display panel
CN108182012B (en) * 2018-02-02 2020-10-30 厦门天马微电子有限公司 Display panel, pressure detection method and display device
JP2021117275A (en) * 2020-01-23 2021-08-10 セイコーエプソン株式会社 Electro-optical device and electronic apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293357A (en) * 1999-10-15 2001-05-02 Smc株式会社 Prssure, sensor, pressure sensor control device and pressure sensor system
CN105511679A (en) * 2015-12-25 2016-04-20 上海天马微电子有限公司 Glass substrate, touch control display screen and touch control pressure calculation method
CN105808010A (en) * 2016-03-31 2016-07-27 京东方科技集团股份有限公司 Substrate, display device and pressure identification method thereof
CN105955540A (en) * 2016-05-28 2016-09-21 业成光电（深圳）有限公司 Touch panel and electronic device
CN106843592A (en) * 2017-02-17 2017-06-13 北京小米移动软件有限公司 Touch control method and device and mobile terminal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104823138B (en) * 2013-09-10 2017-10-03 深圳纽迪瑞科技开发有限公司 A kind of pressure inductive touch-screen and touch display screen and electronic equipment
KR20150102309A (en) * 2014-02-28 2015-09-07 주식회사 코아로직 Pressure sensor for touch panel
CN105118470B (en) * 2015-09-28 2018-06-22 京东方科技集团股份有限公司 A kind of gate driving circuit and grid drive method, array substrate and display panel
CN105892782B (en) * 2016-06-24 2022-02-01 京东方科技集团股份有限公司 Touch display device and manufacturing method thereof
KR101958324B1 (en) * 2016-11-24 2019-03-15 주식회사 하이딥 Touch input device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293357A (en) * 1999-10-15 2001-05-02 Smc株式会社 Prssure, sensor, pressure sensor control device and pressure sensor system
CN105511679A (en) * 2015-12-25 2016-04-20 上海天马微电子有限公司 Glass substrate, touch control display screen and touch control pressure calculation method
CN105808010A (en) * 2016-03-31 2016-07-27 京东方科技集团股份有限公司 Substrate, display device and pressure identification method thereof
CN105955540A (en) * 2016-05-28 2016-09-21 业成光电（深圳）有限公司 Touch panel and electronic device
CN106843592A (en) * 2017-02-17 2017-06-13 北京小米移动软件有限公司 Touch control method and device and mobile terminal

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